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NEIEP 400 Final Review | 100% Correct Answers | Verified | Latest 2024 Version, Exams of Engineering

Thomas Edison State University (TESU)Engineering

What material should be used for seating brushes? - ✔✔Sandpaper Readings on the meter appear to be inaccurate, what should you do? - ✔✔Test meter A machine that converts mechanical energy into electrical energy - ✔✔Generator What is the purpose of interpoles in a motor? - ✔✔Helps prevent neutral planes from shifting In the basic loop circuit generator armature supplies DC power to what DC elevator hoist motor component? - ✔✔Motor Armature If you have leakage resistance to ground, what will you use to test? - ✔✔Megger

Typology: Exams

2023/2024

Available from 08/21/2024

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NEIEP 400 Final Review | 100% Correct
Answers | Verified | Latest 2024 Version
What material should be used for seating brushes? - ✔✔Sandpaper
Readings on the meter appear to be inaccurate, what should you do? - ✔✔Test meter
A machine that converts mechanical energy into electrical energy - ✔✔Generator
What is the purpose of interpoles in a motor? - ✔✔Helps prevent neutral planes from shifting
In the basic loop circuit generator armature supplies DC power to what DC elevator hoist motor
component? - ✔✔Motor Armature
If you have leakage resistance to ground, what will you use to test? - ✔✔Megger
What kind of device would you use to measure current without disconnecting wiring? - ✔✔Clamp on
ammeter
What is the synchronous speed of 3 phase, 60 Hz, 6 pole motor? - ✔✔1200 RPM
Before attempting to measure resistance in an unknown resistor in a circuit, what must be done? -
✔✔Isolate from one side
What is the method used to resolve residual magnetism to an exitor? - ✔✔Flashing the field
What is the inherent current limiter present for a rotating motor armature called? - ✔✔CEMF
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Partial preview of the text

Download NEIEP 400 Final Review | 100% Correct Answers | Verified | Latest 2024 Version and more Exams Engineering in PDF only on Docsity!

NEIEP 400 Final Review | 100% Correct

Answers | Verified | Latest 2024 Version

What material should be used for seating brushes? - ✔✔Sandpaper Readings on the meter appear to be inaccurate, what should you do? - ✔✔Test meter A machine that converts mechanical energy into electrical energy - ✔✔Generator What is the purpose of interpoles in a motor? - ✔✔Helps prevent neutral planes from shifting In the basic loop circuit generator armature supplies DC power to what DC elevator hoist motor component? - ✔✔Motor Armature If you have leakage resistance to ground, what will you use to test? - ✔✔Megger What kind of device would you use to measure current without disconnecting wiring? - ✔✔Clamp on ammeter What is the synchronous speed of 3 phase, 60 Hz, 6 pole motor? - ✔✔1200 RPM Before attempting to measure resistance in an unknown resistor in a circuit, what must be done? - ✔✔Isolate from one side What is the method used to resolve residual magnetism to an exitor? - ✔✔Flashing the field What is the inherent current limiter present for a rotating motor armature called? - ✔✔CEMF

In order to protect internal circuits, how is the 10 amp input jack on a digital multimeter usually protected? - ✔✔Fused What is the field protective relay in series with? - ✔✔Motor shunt field What material is used as insulation between the commutator and the armature shaft? - ✔✔Mica What elements make up commutator film? - ✔✔Copper oxide film, graphite film, free graphite particles and waters vapor components What does it mean when saturation occurs? - ✔✔Holds all the magnetic lines of flux it can hold What kind of meter would you use to detect a ground in the armature coils? - ✔✔Ohmmeter When should lubrication of motor bearings be done? - ✔✔Not running What would be the result if a meter set to current and connected to a voltage source? - ✔✔Blow fuse When commutation is good, what color is the commutator? - ✔✔Chocolate What is a precision shunt used for measuring? - ✔✔Current On a reversible D.C. door operator motor, what angle is the brush mounted? - ✔✔Radially, straight up and down What is the significance of the meter specification of ohms per volt? - ✔✔Internal resistance at specific voltage On the resistance scale of a digital meter, what does the lazy 8 symbol signify? - ✔✔Infinity

2230Ω can also be expressed as? - ✔✔2.23 kΩ Applied voltage on the primary leads current by? - ✔✔ 90 ° CEMF can best be described as? - ✔✔Opposes applied voltage Eddy currents can be described as? - ✔✔Circulating currents set up by magnetic induction a 1:12 fixed voltage transformation ratio transformer is? - ✔✔Step-up How would you check for an open primary winding? - ✔✔Measure resistance across the primary If the secondary winding is open what will happen to the secondary resistance? - ✔✔It will be infinity When the secondary winding is completely shorted what happens to primary current? - ✔✔Current is high How can you reduce ripple? - ✔✔More coils and commutator segments If current carrying wire is placed perpendicular to a field by two magnets of opposite polarity what happens? - ✔✔Conductor is moved at right angles to the flux from the magnetic poles Inherent current-limiter present for a rotating armature? - ✔✔CEMF Elementary AC generator has what that DC doesn't? - ✔✔Split rings What provides the connection for the ends of the armature coils to the commutator? - ✔✔Riser

Neutral plane is? - ✔✔The point in a coils rotation where zero voltage is induced Field that has only a few turns of heavy wire? - ✔✔Series Armature reaction can be compensated for by using? - ✔✔Interpoole windings What are two circuits of a separately-excited generator called? - ✔✔The field and armature circuit In a DC series generator current flows only when? - ✔✔There is a load An elevator that travels faster in the up direction when it is fully loaded that it does when it is empty is _________-compounded - ✔✔Over A shunt generators output drops as load is? - ✔✔Increased Generator series field is connected in parallel with? - ✔✔Series field shunt Series field Is connected is series with? - ✔✔Armature Final acceleration step for a hoist motor? - ✔✔Weakening the shunt field what type of generators pole pieces become excited by residual magnetism? - ✔✔Self excited Most common cause of commutator problems? - ✔✔Brush pressure too light Tranformer eddy currents cause - ✔✔core losses DC motor speed is changed by? - ✔✔Varying the motor field or armature voltage

When voltage change in a pole piece doesn't not produce a proportional change of magnetic flux, it is considered? - ✔✔Hysteresis losses Elevator is pulling through the brake after it stops at a floor. What is the likely problem? - ✔✔Suicide circuit open